The Martello tower was constructed on the site of an existing battery in 1804 after the onset of the
Napoleonic Wars and during the tenure (1803-1813) of
Lieutenant Governor General
Sir John Doyle. Doyle named the tower for the Guernsey native and renowned
Royal Navy Captain, Sir
James Saumarez, who at the time commanded British naval forces in the Channel Islands. To simplify matters, Doyle had a local builder named Gray construct the tower, and two others, see below, under the rubric of "fieldworks", thereby bypassing the Ordnance Corps. The Fort Saumarez tower, like the other two Guernsey Martello towers,
Fort Grey and
Fort Hommet, was intended as a
keep for the battery in which it was placed. The Guernsey Martellos are smaller than the British towers, with the Fort Saumarez and Fort Hommet towers being smaller than the Fort Grey tower. Each mounted a 24-pounder
carronade on the roof to protect the battery. Fort Saumarez and Fort Hommet also have exterior staircases up to the second floor. Doyle was responsible for substantial fortification efforts elsewhere in Guernsey, including the construction of the two other Martello towers. Because of its location, Fort Saumarez also served as one of six to ten
optical telegraph stations that ringed the coast to give warning of approaching vessels. In 1852, the battery at Fort Saumarez received 32-pounder guns and 8" shell guns in place of some of its 24-pounder guns. ==Stützpunkt Langenberg==